[Lupa still isn't sure he understands.]
So it is like infiltration, only willingly and remaining aware of our own lives at the same time?

[He really doesn't have the experiences to make a more accurate comparison there.]

And if you like someone and wish to be comrades with them, wouldn't it be more productive to show them that you are capable and willing to defend them and that they can trust you?

Saying hey doesn't serve much function except as a greeting, I think.